轻型输送带辊压压花成型数值模拟

发布时间：2018-02-15 15:59

本文关键词： 轻型输送带挤出复合 PVC 辊压压花数值模拟　出处：《北京化工大学》2012年硕士论文　论文类型：学位论文

【摘要】：随着我国经济的发展,轻型输送带在工业生产中的地位越来越重要。由于我国轻型输送带发展历史较短,大多数生产工艺较落后,生产效率较低。挤出复合技术应用于轻型输送带的生产,能够大幅度提高轻型输送带的生产效率和自动化程度,有明显的优势。在轻型压花输送带挤出复合过程中,辊压压花过程为核心部分,因此本文将着重对该部分进行研究,利用有限元软件ANSYS12.1/LS-DYNA,选用非线性显式动力分析方法,对该过程进行仿真分析,并对模拟过程中的建模、材料参数设置、载荷约束、边界条件等前处理工作进行研究。在前处理过程中,利用消除负接触能的方法解决负体积问题,提高计算效率。利用后处理软件Ls-prepost分析计算结果,观察花纹成型过程,并通过对坯料板中的两固定节点(X方向与Y方向坐标相等)X方向位移曲线、厚度方向的位移场、塑性应变场及有效应力场的分析,判断制件质量及成型效果。利用同样的研究方法对花纹辊挤压量、辊压速度、辊压温度三个加工工艺参数对于制件质量的影响进行研究。通过对轻型输送带挤出复合辊压压花过程的仿真分析研究,掌握辊压压花过程中物料的变形情况及运动规律,为模具设计、加工工艺优化、制件质量提高等提供理论依据。
[Abstract]:With the development of China's economy, the light belt is becoming more and more important in industrial production. Because of China's light belt short development history, most of the production process is relatively backward, the production efficiency is relatively low. The extrusion composite technology used in the light belt production, can greatly improve the production efficiency and the light belt the degree of automation, has obvious advantages.
In the light conveyor belt extrusion process, roll embossing process as the core part, this article will focus on the part of the study, using the finite element software ANSYS12.1/LS-DYNA, the nonlinear dynamic explicit analysis method of the process was simulated, and the simulation modeling process, material parameters, load constraints are study on the boundary conditions in the pre process. During the process of pretreatment, the method of eliminating the negative contact energy to solve the problem of negative volume, improve the computational efficiency. Using postprocessing software Ls-prepost analysis results, observe the pattern forming process, and through the two fixed nodes in the blank (X direction and Y direction displacement coordinates equal) curve of X direction displacement field, the direction of the thickness of the plastic strain field and stress field analysis, judgment and molding parts quality effect. Using the research methods of pattern and the same The influence of three processing parameters on the quality of parts is studied, including the extrusion quantity, the rolling speed and the rolling temperature.
The simulation and analysis of the process of embossing and rolling of the light conveyor belt is carried out, and the deformation and motion rules of the material in the process of rolling embossing are mastered. It provides a theoretical basis for mold design, optimization of processing technology and improvement of the quality of the parts.

【学位授予单位】：北京化工大学
【学位级别】：硕士
【学位授予年份】：2012
【分类号】：TH132.31

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